It is a faithful saying
This may refer either to what goes before, that all things, all reproaches and sufferings, through the ministration of the Gospel, are endured for the elects' sake; and that shall certainly obtain salvation in Christ, and eternal glory, to which they are predestinated: or to what follows, which being of moment and importance, and difficult to be believed, as that death led to life, and sufferings were the way to the kingdom; the apostle prefaces it in this manner, affirming the truth of it, that it was sure and certain, and to be believed, and depended on as such.
For if we be dead with him;
with Christ, as all his people are, by virtue of union to him; they are dead with him, he and they being one, in a legal sense; when he died, they died with him; being crucified with him, as their head and representative, their old man, their sins, were also crucified with him, being imputed to him, and laid upon him; and through the efficacy of his death, they became dead to sin, both to its damning and governing power, and so are planted together in the likeness of his death; so that as he died unto sin once, and lives again to die no more, they die unto sin, and are alive to God, and shall live for ever. Moreover, this, agreeably to what follows, may be understood of the saints dying for Christ's sake, and the Gospel, whereby they are conformed unto him, and feel the fellowship of his sufferings, and so may be said to be dead with him: and such may assure themselves of the truth of what follows,
we shall also live with him;
as many as were crucified with Christ, and buried with him, rose with him from the dead, and were justified in him, as their head and representative; the free gift came on them to justification of life; and they that are dead to sin, through the efficacy of his death, live a life of sanctification, which they have from him, and is maintained and supported by him, and is to his glory; and they live a life of communion with him, in whose favour is life; and though they die, and for his sake, they shall rise again; and because he lives, they shall live also, even a life of glory, happiness, and endless pleasure. And this is part of the faithful saying, and to be believed, and is believed by the saints: see ( Romans 6:8 ) . Moreover, since the word "him" is not in the original text, and the elect are spoken of in the preceding verse, what if the sense should be this, this is true doctrine, and a certain matter of fact, if we and the elect of God die together in the same cause, and for the sake of Christ, and the Gospel, we shall live together in everlasting bliss and glory?